CN202201914U - Superfine fine reduction device for ferric red mud - Google Patents
Superfine fine reduction device for ferric red mud Download PDFInfo
- Publication number
- CN202201914U CN202201914U CN2011201316893U CN201120131689U CN202201914U CN 202201914 U CN202201914 U CN 202201914U CN 2011201316893 U CN2011201316893 U CN 2011201316893U CN 201120131689 U CN201120131689 U CN 201120131689U CN 202201914 U CN202201914 U CN 202201914U
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- CN
- China
- Prior art keywords
- gas
- red mud
- iron
- gas meter
- reduction device
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Abstract
The utility model belongs to the field of a recycling process for solid waste, and in particular provides a superfine fine reduction device for ferric red mud. The superfine fine reduction device for the ferric red mud is characterized by comprising a gas source system and a reduction system, wherein the gas source system comprises a N2 gas bottle (1), a H2 gas bottle (2), a CO2 gas bottle (3), a N2 gas flow rate meter (4), a H2 gas flow rate meter (5), a CO gas flow rate meter (6), a coal gas reforming device (7) and a gas mixing chamber (8); the reduction system comprises a resistor furnace (9), a control cabinet (10) and a crucible (1). The superfine fine reduction device for the ferric red mud has the advantages that the oxide of iron in the superfine ferric red mud is restored under a low temperature of lower than 1000 DEG, so that the iron purity which is obtained under a solid state is very high for the benefit of separating the restored iron element from other substances.
Description
Technical field
The utility model belongs to the solid waste renewable resources and utilizes technology field, and a kind of meticulous reducing apparatus of iron red mud of ultra-fine mill particularly is provided.
Background technology
Produce iron oxide content height in the red mud in the producing aluminium oxide by bayer process, have resource reutilization and be worth.Aluminum iron red mud recycling mainly adopts reducing roasting and magnetic separation bonded method at present, and ferro element in the red mud is extracted.This method exists shortcomings such as ferro element recycling benefit is lower, and operating procedure is complicated, and temperature is high, and the recovery time is long.Iron red mud recycling level is lower, is difficult to realize that red mud is all as the utilization of resources.
In recent years, this seminar finds that the iron-containing resource (containing waste) of ultra-fine granularity has better reactivity, and yardstick is 2 μ m (10
2～10
4Nm) ultrafine powder is reactive high more a lot of than the common fine grain size iron-containing resource of 80 μ m (200 order), and this seminar of this scale effect is referred to as " meticulous reduction " phenomenon." meticulous reduction " phenomenon makes ferriferous oxide to use pure H in the temperature below 1000 ℃
2Or the CO reduction, obtain sufficiently high reduction degree, obtain temperature required low 200～300 ℃ approximately of identical reduction degree.Meticulous reductive characteristics are: reduction process is the solid reaction of gas one, and reaction product also is solid-state, thus energy consumption of reaction reduce greatly, and the reduzate dispersity higher, sintering does not take place, impurity elements such as P can not be reduced the entering fusant.
China is alumina producing big country, and red mud accumulation volume of cargo in storage reaches 200,000,000 tons, and wherein nearly 100,000,000 tons is Bayer process red mud.Red mud is stored up in a large number, causes problem of environmental pollution easily, exists potential safety hazard.China's iron ore resource is in short supply, at present to external interdependency more than 50%, adopt " meticulous reduction technique " iron red mud is handled, not only help solving the pollution problem that red mud brings, also will help alleviating simultaneously china natural resources pressure.
Summary of the invention
The utility model purpose provides a kind of iron red mud to ultra-fine mill and carries out the ferro element method of direct reduction.Regard iron red mud as fe source, use pure H
2Or CO gas is lower than the iron red mud of ultra-fine mill under 1000 ℃ the non-melt temperature and carries out meticulous reduction.
The iron red mud of ultra-fine mill has enough little granularity (average dimension is 2 μ m), is being lower than the gas-solid reaction kinetic condition preferably of having reduced under 1000 ℃ the non-melt temperature.This meticulous reduction process speed of reaction is high, and energy consumption of reaction is low, and does not have the generation of sintering phenomenon between reaction gained reduzate, helps reducing separating between back ferro element and other elements, can the ferrous material that obtains higher degree.
The meticulous reducing apparatus of a kind of iron red mud of ultra-fine mill comprises air supply system and restoring system two portions, and wherein air supply system comprises N
2Gas cylinder, H
2Gas cylinder, CO
2Gas cylinder, N
2Gas meter, H
2Gas meter, CO gas meter, coal gas reformer and gas mixing chamber; Restoring system comprises resistance furnace, housing and crucible.N
2Direct and the N of gas cylinder
2Gas meter connects, H
2Direct and the H of gas cylinder
2Gas meter connects, CO
2Gas cylinder connects CO gas meter, N through the coal gas reformer
2Gas meter, H
2Gas meter, CO gas meter connect resistance furnace through gas mixing chamber, and resistance furnace is connected with housing, and crucible is placed in the resistance furnace.Can control the atmospheric condition of reduction process through each gas meter; Can control reduction temperature and recovery time processing parameter through housing.
The technological difficulties of the utility model:
The reductive high efficiency: the reductive high efficiency is embodied in the high reduction ratio of ferriferous oxide and high rate of reduction, is reasonably realizing the reductive high efficiency under the reducing process parameter, i.e. rational confirming of reducing atmosphere, reduction temperature and recovery time processing parameter.
The utility model advantage: the oxide compound with iron in the iron red mud of ultra-fine mill under the lesser temps below 1000 ℃ reduces, and is very high in the solid-state iron purity that obtains down, the separating of the ferro element after helping reducing and other materials.
Description of drawings
Fig. 1 is the meticulous reducing apparatus synoptic diagram of the iron red mud of ultra-fine mill
Wherein: 1N
2Gas cylinder, 2H
2Gas cylinder, 3CO
2Gas cylinder, 4N
2Gas meter, 5H
2Gas stream, 6CO gas meter, 7 coal gas reformers, 8 gas mixing chambers, 9 resistance furnaces, 10 housings, 11 crucibles.
Fig. 2 is the iron red mud size-grade distribution situation of ultra-fine mill
Annotate: q is a size-grade distribution among the figure; Q is a cumulative distribution.
Fig. 3 is the size-grade distribution situation of reduzate
Annotate: q is a size-grade distribution among the figure; Q is a cumulative distribution.
Embodiment
Use the meticulous reducing apparatus of iron red mud of ultra-fine mill to reduce processing; At first the iron red mud of ultra-fine mill is put into crucible; Crucible is placed resistance furnace; Can control the atmospheric condition of reduction process through each gas meter in the air supply system, can control reduction temperature and recovery time processing parameter, thereby under the lesser temps below 1000 ℃, the oxide compound of iron in the iron red mud of ultra-fine mill reduced through housing in the restoring system; Very high in the solid-state iron purity that obtains down, the separating of the ferro element after helping reducing and other materials.
Claims (1)
1. the meticulous reducing apparatus of the iron red mud of a ultra-fine mill is characterized in that being made up of air supply system and restoring system two portions; Wherein air supply system comprises N
2Gas cylinder (1), H
2Gas cylinder (2), CO
2Gas cylinder (3), N
2Gas meter (4), H
2Gas meter (5), CO gas meter (6), coal gas reformer (7) and gas mixing chamber (8); Restoring system comprises resistance furnace (9), housing (10) and crucible (11); N
2Direct and the N of gas cylinder (1)
2Gas meter (4) connects, H
2Direct and the H of gas cylinder (2)
2Gas meter (5) connects, CO
2Gas cylinder (3) connects CO gas meter (6), N through coal gas reformer (7)
2Gas meter (4), H
2Gas meter (5), CO gas meter (6) connect resistance furnace (9) through gas mixing chamber (8), and resistance furnace (9) is connected with housing (10), and crucible (11) is placed in the resistance furnace (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201316893U CN202201914U (en) | 2011-04-29 | 2011-04-29 | Superfine fine reduction device for ferric red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201316893U CN202201914U (en) | 2011-04-29 | 2011-04-29 | Superfine fine reduction device for ferric red mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202201914U true CN202201914U (en) | 2012-04-25 |
Family
ID=45966046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201316893U Expired - Fee Related CN202201914U (en) | 2011-04-29 | 2011-04-29 | Superfine fine reduction device for ferric red mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202201914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866131A (en) * | 2014-03-13 | 2014-06-18 | 北京科技大学 | Method for recycling blast furnace fly ash containing zinc |
-
2011
- 2011-04-29 CN CN2011201316893U patent/CN202201914U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866131A (en) * | 2014-03-13 | 2014-06-18 | 北京科技大学 | Method for recycling blast furnace fly ash containing zinc |
| CN103866131B (en) * | 2014-03-13 | 2016-06-08 | 北京科技大学 | A kind of containing zinc blast furnace dedusting ash renewable resources treatment process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20170429 |